ALLEN PARK, Mich. (AP) - Coach Jim Caldwell has already made his mark as the new leader of the Detroit Lions.

Caldwell seems cool, calm and collected. So far, players like what they have seen and heard from him.

Quarterback Matthew Stafford described Caldwell as ''confident and level-headed,'' after a three-day voluntary minicamp ended on Thursday. Stafford says Caldwell has earned the team's respect in part because he has coached in multiple Super Bowls.

Caldwell lost a Super Bowl as Indianapolis' head coach. He helped the Colts and Baltimore Ravens win NFL titles as an assistant coach.

The Lions hired Caldwell in January after they fired coach Jim Schwartz with a 29-51 record over five seasons.